abc's jon karl has the doctor's note tonight and more on the controversy. jon? good evening. david.orter: good evening, well, here is the doctor's note that michele bachmann has released today. it comes from the in-house doctor here in congress and it gives her a clean bill of health. the letter from the top doctor in congress says bachmann has haha extensive evaluation. "your migraines occur infrequently. when you do have a migraine, you are able to control it well, with medication." the issue was first raised monday by the conservative daily caller website, which quoted anonymous sources saying bachmann frequently suffers from incapacitating headaches. today, she was still facing questions about the report. >> well, we released a statement on this issue, and the focus that i've had, again, is on the fact that as commander in chief, i'm going to make sure that we get our fiscal house in order. >> reporter: bachmann acknowledges occasional migraines. her campaign points out her packed schedule hasn't been affected a bitit but today, tim pawlenty, the republican candidate most